ESX QM500.4

The ESX QM500.4 from the QUANTUM series is a compact 4-channel digital amplifier that is particularly well-suited for high-performance car audio systems with limited installation space.

Thanks to its efficient Class D technology, the amplifier delivers high output power in a compact design. It is suitable for driving front and rear speakers, as well as combinations of speakers and a bridged subwoofer.

The flexible channel configuration allows for a variety of system setups. Combined with the built-in adjustment options, the amplifier can be adapted to different speaker and vehicle setups.

Technical Specifications

RMS output power at 14.4 V:

• 4 × 80 watts RMS at 4 ohms

• 4 × 125 watts RMS at 2 ohms

• 2 × 250 watts RMS at 4 ohms (bridged)
  
  

Maximum output power at 14.4 V:

• 4 × 160 watts MAX at 4 ohms

• 4 × 250 watts MAX at 2 ohms

• 2 × 500 watts MAX into 4 ohms (bridged)
  
  

General Technical Specifications:

• Amplifier Type: 4-Channel Digital Amplifier

• Amplifier Class: Class D

• Series: ESX QUANTUM QM

• Frequency response: 10 Hz – 38,000 Hz (−3 dB)

• Signal-to-noise ratio: over 87 dB

• Damping factor: over 100

• Total Harmonic Distortion plus Noise (THD+N): less than 0.01%

• Input sensitivity: 0.2 – 5 V

• Efficiency: up to 83%

• Power Supply: MOSFET PWM

• Protection circuit: 3-way

• External fuse: 50 A

• Start-stop capability: up to 7.5 V

• Dimensions (W × H × L): 190 × 35 × 102 mm
  
  

Crossover networks for channels 1 and 2:

• Operating Modes: Full / HP / Copy

• High-pass filter (HPF): 50 – 5,000 Hz

• Copy Mode: Apply the settings from Channels 3 and 4
  
  

Crossover networks for channels 3 and 4:

• Operating Modes: Full / HP / LP / BP

• High-pass filter (HPF): 10–500 Hz

• Low-pass filter (LPF): 50 – 5,000 Hz

• Bandpass function: available

• Subsonic filtering: adjustable via high-pass filters
  
  

Connections and Features:

• RCA Inputs

• High-level inputs with EPS® (Error Protection System)

• Automatic power-on function via DC offset or audio signal

• Full-range stereo RCA outputs

• Compact Bass Level Remote Control

• Aluminum heat sink with side panels made of cast aluminum

• Carefully selected, acoustically matched components

• Compact design for space-saving installation